{
  "version": "1",
  "id": "default",
  "rules": [
    {
      "name": "email",
      "pattern": "[A-Za-z0-9._%+-]+@[A-Za-z0-9.-]+\\.[A-Za-z]{2,}",
      "flags": "g",
      "replacer": "[REDACTED_EMAIL]",
      "description": "RFC 5322-ish email — baseline, not exhaustive."
    },
    {
      "name": "phone",
      "pattern": "(?:\\+?1[-.\\s]?)?(?:\\(?\\d{3}\\)?[-.\\s]?)?\\d{3}[-.\\s]?\\d{4}",
      "flags": "g",
      "replacer": "[REDACTED_PHONE]",
      "description": "US-style phone number with optional country prefix."
    },
    {
      "name": "ssn",
      "pattern": "\\b\\d{3}-\\d{2}-\\d{4}\\b",
      "flags": "g",
      "replacer": "[REDACTED_SSN]",
      "description": "US Social Security Number."
    },
    {
      "name": "ipv4",
      "pattern": "\\b(?:\\d{1,3}\\.){3}\\d{1,3}\\b",
      "flags": "g",
      "replacer": "[REDACTED_IP]",
      "description": "Dotted-quad IPv4 address."
    },
    {
      "name": "credit-card",
      "pattern": "\\b(?:\\d[ -]*?){13,19}\\b",
      "flags": "g",
      "replacer": "[REDACTED_CC]",
      "description": "Long digit run consistent with a credit-card PAN. Validate with Luhn for stricter matching."
    },
    {
      "name": "uuid",
      "pattern": "\\b[0-9a-fA-F]{8}-[0-9a-fA-F]{4}-[0-9a-fA-F]{4}-[0-9a-fA-F]{4}-[0-9a-fA-F]{12}\\b",
      "flags": "g",
      "replacer": "[REDACTED_UUID]",
      "description": "RFC 4122 UUID."
    }
  ]
}